Officers said they flirted their way into the room of two Las Vegas hotel guests, plied them with booze and performed sex acts on them before attempting to flee with the wallet-busting watches inside their bodies.

But Bryanna Warren, 23, Trinity Kennard, 23; and Charmella Triggs were arrested after CCTV cameras in the lifts of the Encore hotel-casino captured footage of two of the women hiding the sought-after timepieces.

A police arrest report said the sting began when Warren and Triggs flirted with a tourist from India at a hotel bar at about 3:30am.

The three had drinks inside his room and were then joined by the man's friend. The women then invited Kennard to the room.

Cops say one of the women undressed one of the men and performed a sexual act on him in a separate part of the room.

During the act, the man removed his £7,500 Rolex watch. Another woman also began to get physical with the other guest at the same time, prompting him to remove his £2,500 Rolex.

Police said one of the men noticed his watch being taken and the women then ran towards a lift with one of the men following.

One of the thieves then pulled out a stun gun and threatened the victim to secure their escape.